Cover for an antenna



FIG. 1 is a bottom, front and left perspective view of a cover for an antenna showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken lines in the drawings illustrate portions of the cover for an antenna which form no part of the claimed design. 

CLAIM The ornamental design for a cover for an antenna, as shown and described. 